Screw-top for cans.



No. 834,125. PATENTED OCT. 23, 1906.

' E. M. HALLBAUER.

SCREW TOP FOR CANS.

' APPLICATION FILED MAY-15.1905.

W J i I Erma/11. flallbzuier this ERNST MORITZ HALLBAUER, or AMERICANCAN COMPANY, OENEW JERSEY.

CHICAGO, ILLINOIS, ASSIGNOR TO OF N EW- YORK, N. Y., A CORPORATIONSCREW-TOP FOR CANS.

To ail whom it may concern.- I Be it known that I, ERNST Monrrz HALL-BAUER, a citizen of the United States, residing in Chicago, in-thecounty of Cook and State of Illinois, have invented a new and useful Imrovement in Screw-Tops for Cans, of which the following is aspecification.

My invention relates serew top cans. v I

The object of my invention is toprovide a screw to can of a simple,eflicient, strong, and dura le construction, in which the screwcap maybe readily removed, however tightly it may become stuck or fixed byreason of the sticky or gummy contents of the can, and

Without danger of breakage; My invention consists in the means I employto practically accomplish this important object or result-that is tosay, it consists in a screw-top can having a screw-cap furnished with anupwardly-projecting rim and with a supplemental cap-disk having anupwardlyprojecting deep flange or rim fitting inside theupwardly-projecting rim of the screwcap, the two nesting rims of thescrew-cap and supplemental cap-disk having a rolled, folded, or otherseam uniting the same at theirupper ends and reinforcing and stiffenerims, said upwardly-projecting rims of the screw-cap and supplementaldisk being furnished with a diametrical slot to receive anail orknife-blade or other implement to serve as a lever in unscrewing the caMy invention also consists in the novel to improvements in constructionof parts and devices and in the novel combinations of herein shown ordescribe In the accompanying drawings, forming a part of thisspecification, Figure 1 is a side elevation of a screw-top can embodyingm invention; Fig. 2 is a dparts and devices plan view, and Fig. 3

is an enlarged central vertical section.

In the drawings, A re sel of any suitable kind nished with flanges orceive the base I) of the is soldered thereto. The screw-cap B' hasscrew-threads b and an inturned flange b to serve as a seat for the corkdisk or packing C of the screw-cap D. The screw-cap D is furresents acan or vesaving a head a, furcollars a a to reserew top B, which nishedwith screw-threads d and with upwardly-projeeting extension or rim (1'above the cork disk C. Y

Specification of Letters Patent.

Application filed May 16,1905. Serial No. 260,398.

y, said cork or packing and sai mental cap-disk F to with a cork orpacking disk the cork or screw-cap Patented Oct. 23, 1906.-

F is a supplemental ca -disk having an upwardlypro ecting deep ange orrim f fitting and nesting snugly within the u wardlyprojecting rim d ofthe capdisk The upper ends of the nesting rims d and f firmly and rigidlunited together by a rolled seam f, which a so serves to strengthenandstiffen the united nesting rims. The united and nesting rims d f arefurnished with a slot D, preferably extending substantiallydiametrically of the screw-cap to receive any suitable tool or implementto act as a lever in I unscrewing the cap.

G is a sheet-metal disk or washer interposed between the packing C andthe sup leprevent said capisk sticking to the washer, and thusinterfering with the unscrewing of the cap. The sup lemental' cap-disk Fhas an annular shou der or bead f to give it a narrow bearing on thedisk or washer G, and thus enable the screwca%to be more readilyunscrewed.

y this means a very effective, tight, and perfect closure is produced,while at thesame time the screw-cap 'may be readilyloosened orunscrewed, however tightly seated or stuck or fixed in place.

'I claim I 1.- In a screw-top can, the combination with a screw-top, ofa {screw-cap furnished an having an upwardly-projecting rim extendingabove packing disk, a supplemental capit may be disk h or rim fittingand nesting within sai screwcap rim, said nesting rims both beingfurnishedwith -.re'gister1n slotsto receive a lever for unscrewing tmetal disk or washer osed between supplemental disk, said supplementaldisk having a narrow annular pro ection bearing against said interposedwasher, substantially as specified.

inte

2. In a screw-top can, the combinationwith a screw-top, of a screw-cafurnished with a cork or packing disk an having an upwardly-projectingrim extending above the cork or packing disk, a supplemental capdiskhaving an upwardly-projectin or rim tightly fitting and nesting witIiinsaid rim, said nesting rims being both furnishe with registering slotsto receive a lever for are aving an upwardly-projectin flange e cap, anda sheetflange I unscrewing the screw-cap, and said nesting slotted rimshaving each an inward roll or fold at its up er end to strengthen andstiffen the same and cause them to mutually sfiuplport each other,substantially as speci- 3. In a screw-cap can, the combination with ascrew-top, of a screw-cap furnished with a cork or packing disk andhaving an upwardly-projecting rim extending above the cork or packingdisk, a supplemental capdisk having an upwardly-projecting flange or rimtightly fitting and nesting within said screw-cap rim,"said nesting rimsmutually supporting and bracing each and being both f rnished withregistering slots to receive a lever for unscrewing the screw-cap, andsaid nesting rims having a folded or rolled seam uniting the same attheir upper ends and serving as an enlargement or reinforcement tostrengthen and stiffen said nesting rims and cause them to mutuallysupport each other when the lever is applied thereto to unscrew the cap,substantial y as specified.

4. In a screw-pap can, the combination with a screw-top, of a screw-capfurnished with a cork or packing disk and having an upwardly-projectingrim extending above the cork or packing disk, a supplemental cap-diskhaving an upwardly-promoting flange or rim fitting and nesting withinsaid screw-cap rim, said nesting rims being both furnished withregistering slots to receive a lever for unscrewin the screw-cap, saidnesting rims having a olded or rolled seain uniting the same at theirupper ends and serving as an enlargement or reinforcing to strengthenand stiffen said nesting rims, and a sheet-metal disk or washerinterposed between said cork or packing and said supplemental cap-disk,said supplemental disk having a narrow annular projection bearingagainst said interposed washer, substantially as s ecified.

ERNST MORITZ HAL BAUER.

Witnesses:

H. M. MUNDAY, P. ABRAMS.

